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首页> 外文期刊>Journal of Crystal Growth >Highly efficient preparation of size-controlled CdS quantum dots with high photoluminescence yield
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Highly efficient preparation of size-controlled CdS quantum dots with high photoluminescence yield

机译:高效制备尺寸控制的CdS量子点,具有高的光致发光产量

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摘要

We investigated the influence of methylviologen (MV~(2+)), which accelerates the photoetching process used for controlling size distribution, on the photoluminescence (PL) properties of colloidal CdS quantum dots (QDs). A combination of the photoetching process and surface modification with a Cd(OH)_2 layer enabled us to prepare size- and surface-controlled CdS QDs. The efficiency of the photoetching process is extremely enhanced by the addition of MV~(2+). The temperature dependence of PL decay profiles indicates that MV~(2+) does not affect the PL properties of QDs. Consequently, the addition of MV~(2+) results in a highly efficient preparation of size-controlled CdS QDs without degradation of the PL efficiency.
机译:我们研究了甲基紫胶(MV〜(2+))对胶体CdS量子点(QDs)的光致发光(PL)性能的影响,该甲基紫精可以加速用于控制尺寸分布的光刻工艺。结合Cd(OH)_2层的光蚀刻工艺和表面改性,使我们能够制备尺寸和表面受控的CdS QD。通过添加MV〜(2+),极大地提高了光刻工艺的效率。 PL衰变曲线的温度依赖性表明MV〜(2+)不影响量子点的PL特性。因此,添加MV〜(2+)可以高效制备受尺寸控制的CdS QD,而不会降低PL效率。

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